Buff-wheel attachment.



' No. 669,633.' Patented Mar. 12, IBM.

" J. H. GREEN.

'BUFF WHEEL ATTACHMENT.

(Application filed Dec. 17, 1900.|

2 Sheets-Sheet I.

{N0 IodeL) NVENTOR m HBREEN. BYATFXW \TNESSES No. 669,633. Patented Mar.l2, il90l.

J. H. GREEN.

BUFF' WHEEL ATTACHMENT.

, (Application filed Dec. 17, 1900.; (No l odel.)

2 Sheets-Sheet 2.

N \T NEESES INVENTOR fwmwia F OHN HEREEN BY A'ITY.

tion through the bufi-wheel attachment. Fig.

drawings, to which reference is hereby made,

. JOHN H. GREEN, OF SPRINGFIELD, ILLINOIS.

BUFF-WHEEL' ATTACHMENT.

SPECIFICATION forming part of Letters Patent No. 669,633, dated March12, 1901.

Application filed December 17, 1900. Serial No. 40,170. (No model.)

T0 on whom it may concern:

Be it known that I, JOHN H. GREEN, a citizen of the United States,residing at Springfield, in the county of Sangamon and State ofIllinois, have invented certain new and useful Improvements in BuffWh'eel Attachments, of which the following is such a full, clear, andexact description as will enable others skilled in the art to which itappertains to make and use my said invention.

My invention relates to buif-wheel attachments such as are adapted foruse on sewing-machines, dental lathes, or other similar machines havinga revolving fly-wheel.

The purposes of my invention are to provide a buff-wheel attachment soconstructed and arranged that it will fit on fly-wheels of differentsizes without any special adj ustment of the parts of the mechanism, toprovide shouldered and curved arms of improved construction adapted toengage with the perimeter 0f the fiy-wheel on which the device is used,to provide a mandrel-bolt of novel and improved form, to provide simpleand effective means for retaining the spring-arms in proper relation toeach other, and to provide spring-arms and a securing device therefor soconstructed and arranged that said arms may be placed and securedparallel to each other so compactly that the entire device may be packedin much smaller space than it would occupy if the arms were stationary.

With these ends in view myinvention consists of the novel features ofconstruction and combinations of parts shown in the annexed andhereinafter particularly described, and finally recited in the claims.

In the drawings I have illustrated my device as applied to asewing-machine. It may, however, be applied to dental lathes or othersimilar machines without any change in the construction of the device.

Referring to the drawings, Figure 1 is a perspective view of thecomplete device in position on the fly-wheel of a sewing-machine. Fig. 2is an enlarged longitudinal axial sec- 3 is a vertical transversesection on the line 3 3 of Fig. 2. Fig. 4 is atop plan of the devicewith the arms placed and secured parall lel to each other. Fig. 5 is aside elevation of an alternative form of the device. Fig. 6 is ahorizontal longitudinal section on the line 6 6 of Fig. 5. Fig. 7 is aside elevation of a four-armed device, showing the arms placed to lieside by side. Fig. 8 is an enlarged partial longitudinal section showinga square shoulder on the mandrel-bolt.

Similar reference-numerals designate like parts in all of the views.

I have herein designated my device as a buffwheel attachment and in thedrawings have shown a buff-wheel in place on the device; but it isobvious that a fan, a saw, or an emery-wheel may be used thereon withoutany change in the construction of the device.

The bolt 1 has a hexagonal head 1, a cylindrical shoulder 1 acylindrical screwthreaded part i and a conical or taperingscrew-threaded part 1. Nuts 2 and 3 fit on the cylindrical part 1 In oneend of the nut 2 is a circular recess 2, in which the shoulder 1 fitsloosely. Curved arms 4, of spring-steel or other springy material, areconnected with the bolt 1, as hereinafter explained. The bolt 1 servesto connect all of the arms together. It also serves as a mandrel onwhich a buff-wheel, a grinding-wheel, or other implement may be mounted.This double use of the bolt is of great practical advantage on accountof lightness and simplicity of construction, which are very desirablefeatures in devices of this class. Each of the arms 4 has a curved part4, adapted to clasp the rim of a wheel, as shown in Fig.1, a shoulder 4which abuts against a face of the bolt-head l when the parts areassembled as shown in Figs. 1 and 3, and a part 4 at a right angle tothe part 4 and pierced by a hole in which the shouldered part 1 of thebolt 1 fits. All of the arms 4 are exactly alike, except a slightvariation in length, such that when the arms are assembled on the bolt1, with the parts 4 overlapping, as shown, the free extremities of thearms will all project exactly the same distance beyond the bolt-head 1When the arms 4 are in place on the bolt 1, as shown in Figs. 2 and 4,the nut 2 presses against the parts 4, so as to clamp all of the armsfirmly together, and the bolt-head l,

against the faces of which the shoulders 4 of the arms respectivelyabut, prevents the arms from turning on the bolt. The nut 3 serves as ajam-nut to prevent the nut 2 from turning. It may also be used to securea grinding-wheel, a saw, or other implement placed on the bolt 1,between the nuts 2 and 3, as shown in Fig. 5. When the nuts 2 and 3 areunscrewed, the arms 4 may be separately turned on the bolt 1 to lie sideby side, and the nuts may then be screwed down to secure the parts inthe position shown in Fig. 4. When the parts are in this position, thedevice occupies much less space than it does when the arms are spreadand may therefore be compactly packed in a relatively small package.This feature is obviously of practical advantage on account of thegreater convenience in handling and the diminished cost of package andtransportation. By reason of the springiness of the arms 4 they readilyadapt themselves to Ely-wheels of different sizes without any specialadjustment of the mechanism.

In the drawingsl have shown a bolt having a hexagonal head and threeindependent arms respectively contacting with three faces of saidbolt-head; but a bolt having a head of any other suitable polygonal formand any other suitable number of arms contacting with the faces of saidbolt-head may be used Without departing from my invention. For example,a square-headed bolt and two arms contacting with opposite faces of saidsquare bolt-head may be used, or a bolt having a square head and fon rindependent arms, each contacting with one face of said bolt-head, asshown in Fig. 5, may he used. It is essential only that the arms shallbe mounted on a bolt common to all in such manner that the arms may beheld firmly on and turn with the bolt and may also be adjusted so thatall of them will lie side by side, substantially as set forth.

Instead of using a bolt having a hexagonal head and a cylindricalshoulder and shouldered arms abutting against the faces of thebolt-head, as shown in Figs. 2 and 3, I may, without departing from myinvention, use a bolt having a polygonal head and a polygonal shoulderand arms having polygonal holes fitting on the shoulder of said bolt andshoulders fitting against the faces of the bolt-head, substantially asshown in Figs 6 and 8.

In practical use the arms are sprung apart to permit the points of thearms to pass over the perimeter of the wheel, and when in place thespringiness of the arms acts to cause the curved extremities of the armsto firmly grip the wheel.

Having fully described my invention, what I claim as new, and desire tosecure by Letters Patent, is-

1. In a device of the class described, springy arms each having ashoulder and each having a hole adapted to receive a bolt, incombination with a bolt passing through the holes in said arms andhaving a head with faces against which the shoulders on said armsrespectively abut, and means for securing said arms on said bolt as setforth.

2. In a device of the class described, the

combination of a mandrel-bolt, arms mounted on said mandrelbolt and asecuring device securing said arms on said mandrel-bolt, as set forth.

In witness whereof I have hereunto subscribed my name, at Springfield,Illinois, this 10th day of December, 1900.

JOHN H. GREEN.

Witnesses:

FRANK G. LISTER, MAY F. RYAN.

